PhotoShock!

Launch the App and go into "OPTIONS" and choose a picture and a scream at your pleasure.
Say to a friend who is a nice place to take a nice photo or you have something interesting to show him...
From the main menu, choose whether to take a photo or choose it from the gallery.
Once you see the photo, give within 3 seconds the phone to the victim, asking to observe the details...
When the time expires, the picture will be replaced with a terrifying image, with a bloodcurdling scream and vibration...
The fear is guaranteed !!!